A procedure used in signaling traffic management to keep a signaling link unavailable to user-part-generated signaling traffic except for test and maintenance traffic. [T1.226-1992]

An application process within a management domain that affects monitoring and control functions on managed objects, management subdomains, or both. A management system may also communicate with its peers (that may be resident in other management domains). Synonym managing system. [T1.215-1994]

Synonym management system.

A code in which (a) data and clock signals are combined to form a single self-synchronizing data stream, (b) each encoded bit contains a transition at the midpoint of a bit period, (c) the direction of transition determines whether the bit is a "0" or a "1," and (d) the first half is the true bit value and the second… (Read More →)

1. Access control based on access rights granted by the System Security Officer [CESG].
Note: Normally enforced by reference to security clearances of subjects and security classes of objects in accordance with the rules specified in the System Security Policy.
2. A means of restricting access to objects based on the sensitivity (as represented by a label) of the information… (Read More →)

Part of a message that contains those parameters that are mandatory and of fixed length for a particular message type. [T1.110-1987]

Part of a message that contains mandatory parameters of variable length. [T1.110-1987]

In multimode fiber optics, a technique used to modify the modal distribution of a propagating optical signal.
Note: A cylindrical rod wrap consists of a specified number turns of fiber on a mandrel of specified size, depending on the fiber characteristics and the desired modal distribution. It has application in optical transmission performance tests, to simulate, i.e., establish, equilibrium mode… (Read More →)

1. A procedure that is used to detect whether data have been modified either accidentally or intentionally. Synonym modification detection. [2382-pt.8]
2. A mechanism which is used to detect whether a data unit has been modified (either accidentally or intentionally) [7498-2].

In cryptosystems, a bit string that is a function of data to which it is attached for the purpose of manipulation detection.
Note 1: The resulting message (data plus MDC) may then be encrypted to achieve secrecy or data authentication.
Note 2: The function used to generate the MDC must be public. [After 2382-pt.8]